Ohh man never really need help in studying... But this lecturer I just dun understand what she teaching... Just this certain module called Engineering Materials...
Anyone taking this module?
I am in mechanical engineering in NP for your info...
ohh btw, the part i need help is the tensile stress or whatever stress so many stress... no wonder i also stress... and the 3 hardness test on brinell test, rockwell test, vicker test, or dunno what lah so many test there...
anyone know what am i talking about? lol
haha i graduate from np already =p
but i nt from mechanical engineering...i from biomedical engineering...
but my course did covered a module related to this, the lecture note got cover on this? if i didnt remember wrongly got a picture cover all the 3 types of test.
Originally posted by nightzip:what is it specifically you dont know?
Yah the 3 hardness test got different hardness scales and have different types of punch shapes and diameter. so?
You need to put the scales side-by-side if you want to know what 1 scale value is to the other. And the hardness value is of what units, and how to calculate properties like even modulus from the indentation etc.Got many stresses in the stress/strain graphs, e.g. ultimate tensile stress <=== this one is only on the engineering stress/strain plot, then there is the true stress/strain VS nominal or engineering stress/strain. True stress/strain is where its the instantaneous value of stress with consideration of necking or reduction of cross-sectional area, where engineer stress do not.
Then there is the yield stress, fracture stress, etc. yield is when the material deforms plastically, while fracture/fail stress, the value of stress where the material totally detaches and fails by coming apart.
WOOHOO!!! YOU UNDERSTAND WHAT I AM TALKING ABOUT!
nightzip mind giving me your handphone number? haha i want to sms you... cus i have not study yet, and i'll only have question when i study lol